The
Instruction in Army Telegraphy and Telephony Volume I - Instruments, 1914 was issued by the War Office. The manual is 356 pages long and gives details on the telegraph and telephony instruments of the day.
Pages Gallery
Chapter 11 Figure 8 - Telephone, Hand, A, Mark I
Chapter 11 Figure 9 - Telephone, Hand, C, Mark II
Chapter 15 Figure 5 - Transmitter, vibrating, Mark IV
Chapter 15 Figure 6 - Connections of a Transmitter, vibrating, Mark IV with Telephone, Hand, A
Chapter 15 Figure 7 - Connections of a Transmitter, vibrating, Mark IV with Telephone, Hand, C Mark II
Chapter 15 Figure 8 - Connections of a Vibrator, Telegraph with Telephone, Hand, C Mark II